Spatial information capturing device

ABSTRACT

A spatial information capturing device includes a structured light generation module, a camera module and a process controller. The structured light generation module provides a structured light pattern to a target object, so that an evaluation pattern is formed on the target object. The camera module includes a lens group, an optical encoder and a sensing unit. The optical encoder has a reference pattern. The reference pattern and the evaluation pattern have at least one corresponding pattern feature. In addition, both of the reference pattern and the evaluation pattern are projected on the sensing unit. The process controller compares a pattern feature difference between the reference pattern and the evaluation pattern, and realizes a spatial distance information of the target object according to a result of comparing the pattern feature difference. Hence, the configuration or structure of the spatial information capturing device is simplified.

FIELD OF THE INVENTION

The present invention relates to a spatial information capturing device,and more particularly to a spatial information capturing deviceincluding a structured light generation module to generate a pattern anda camera module to capture the pattern in order to extract a spatialinformation efficiently.

BACKGROUND OF THE INVENTION

Recently, with the development of electronic industries and the advanceof industrial technologies, various electronic devices are designed andproduced toward small size, light weightiness and easy portability.Consequently, these electronic devices can be applied to mobilebusiness, entertainment or leisure purposes whenever or wherever theusers are. In these devices, probably the image-taking devices are mostwidely used as appeared in many kinds of fields, such as smart phones,wearable electronic devices or any other appropriate electronicapparatus. These imaging devices are attractive to daily applicationsfor human because they are small and can be easily carried.

With the improvement of the living quality, people's demands on morefunctions of the imaging devices are progressively increased. In manycircumstances people needs more flexible input/output medium forinformation transfer or exchange. The examples of media may be virtualkeyboard or display by which spatial information is extracted, deliveredor recognized via non-typical means. For example, many people arewilling to acquire 3D images which can be contributed as a specialmethodology. Preferably, the 3D image contains accurate spatialinformation. Indeed, people may like to acquire the distance measuringfunctions in order to recognize hand gestures with the portableelectronic devices. Normally, the spatial or depth information or thedistance can be measured by a TOF (Time of Flight) measurement method ora dual camera distance measurement method.

As known, the measured result of the TOF measurement method has goodaccuracy. However, when the TOF measurement method is expanded to theplanar scenario application or the multi-point scenario application, thesoftware computing technology is very complicated and computational loadis heavy. Moreover, the additional uses of the specified computing chipand integrated circuits (ICs) require lot of power consumption and highcomputing cost. Moreover, the TOF measurement method is readily affectedby the ambient brightness. If the light pollution in the surroundings isserious, the accuracy of the measured result is low. On the other hand,the software computing technology for the dual camera distancemeasurement method is somewhat complicated and not easier. Moreover,since the dual camera distance measurement method uses two cameras, thedual camera distance measurement method are advantageous over the TOFmeasurement method in power consumption and computing cost. However,since the performance of measuring the distance from the smooth surfaceby the dual camera distance measurement method is inferior, the measuredresult about the distance from the smooth surface has lower accuracy.

Therefore, there is a need of providing a miniature spatial informationcapturing device capable of effectively acquiring a spatial distanceinformation of a target object in a quick way.

SUMMARY OF THE INVENTION

An object of the present invention provides a spatial informationcapturing device capable of effectively acquiring a spatial distanceinformation of a target object in an efficient way. The structure of thespatial information capturing device is thus further simplified.Consequently, the processing procedure of the associated controller issimplified, and then, the cost is reduced.

In accordance with an aspect of the present invention, there is provideda spatial information capturing device. The spatial informationcapturing device includes a structured light generation module, a cameramodule and a process controller. The structured light generation moduleprovides a structured light pattern to a target object, so that anevaluation pattern is formed on the target object. The camera moduleincludes a lens group, an optical encoder and a sensing unit. Theoptical encoder has a reference pattern. The reference pattern and theevaluation pattern have at least one corresponding pattern feature. Inaddition, both of the reference pattern and the evaluation pattern areprojected on the sensing unit. The process controller is incommunication with the sensing unit. The process controller compares apattern feature difference between the reference pattern and theevaluation pattern, and realizes a spatial distance information of thetarget object according to a result of comparing the pattern featuredifference.

In an embodiment, the lens group includes plural lenses, and the opticalencoder and the plural lenses are sequentially arranged along an opticalaxis of the lens group. The evaluation pattern is transmitted throughthe plural lenses and projected onto the sensing unit along the opticalaxis. The reference pattern is projected onto the sensing unit along theoptical axis. The optical encoder is attached on the lens group, or theoptical encoder is separated from the lens group.

In an embodiment, the lens group includes plural lenses. The evaluationpattern is transmitted through the plural lenses and projected onto afirst sensing position of the sensing unit. The reference pattern isprojected onto a second sensing position of the sensing unit. The firstsensing position and the second sensing position are different. Theoptical encoder is attached on the lens group, or the optical encoder isseparated from the lens group.

In an embodiment, the lens group includes a beam splitter and plurallenses, and the beam splitter splits allows light beams to beselectively propagated along a first optical axis or a second opticalaxis. The evaluation pattern is transmitted through the plural lensesand the beam splitter along the first optical axis and projected ontothe sensing unit along the first optical axis. The reference pattern isdirected to the beam splitter along the second optical axis andreflected to the sensing unit along the first optical axis. The opticalencoder is attached on the lens group, or the optical encoder isseparated from the lens group.

In an embodiment, the optical encoder is a self-illuminating element, orthe optical encoder is an optical encoding film.

In an embodiment, the optical encoder includes plural liquid crystalstructures. The plural liquid crystal structures are managed by aprogrammable unit, so that the reference pattern is controllable.

In an embodiment, a wavelength of a light beam from the optical encoderis different from a wavelength of a structured light from the structuredlight generation module.

In an embodiment, the camera module further includes a casing and anadjusting mechanism, and the adjusting mechanism is partially exposedoutside the casing. The adjusting mechanism is linked with the opticalencoder, and the optical encoder is driven by the adjusting mechanism.Consequently, relative positions between the optical encoder and thelens group and/or relative positions between the optical encoder and thesensing unit are adjustable by a user.

In an embodiment, the structured light generation module includes alight source, a collimating lens and a diffractive optical element. Thestructured light pattern from the structured light generation modulecorresponds to the evaluation pattern on the target object. The lightsource includes a laser diode, a light emitting diode, an organic lightemitting diode and/or a light-emitting unit that emits light beams withwavelengths in a thermal band.

In an embodiment, the structured light pattern is a grid pattern, aradial-mesh pattern, a multi-point pattern, a symmetric pattern and/oran asymmetric pattern.

In an embodiment, the structured light generation module and the processcontroller are dynamically linked with each other. The structured lightgeneration module is adjusted by the process controller according to adynamic change of the evaluation pattern.

In an embodiment, when a light source of the structured light generationmodule is adjusted by the process controller, the evaluation pattern iscorrespondingly changed.

In an embodiment, when a diffractive optical element of the structuredlight generation module is adjusted by the process controller, theevaluation pattern is correspondingly adjusted.

From the above descriptions, the spatial information capturing device ofthe present invention is equipped with the optical encoder. The opticalencoder has the reference pattern. The evaluation pattern is generatedby the structured light generation module and formed on the targetobject. The reference pattern and the evaluation pattern have at leastone corresponding pattern feature. The reference pattern and theevaluation pattern can be simultaneously projected onto the sensingunit. By comparing the pattern feature difference between the referencepattern and the evaluation pattern, the process controller realizes aspatial distance information of the target object. Since it is notnecessary to previously store the contents of the reference pattern intothe process controller, the additional installing time and theadditional labor cost are saved. Moreover, since the processingprocedure of the process controller is simplified, the computing andcomparing speed will be increased and the computing cost will bereduced.

The above objects and advantages of the present invention will becomemore readily apparent to those ordinarily skilled in the art afterreviewing the following detailed description and accompanying drawings,in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates a spatial information capturing devicefor evaluating a target object according to an embodiment of the presentinvention;

FIG. 2 schematically illustrates a camera module according to a firstembodiment of the present invention;

FIG. 3 schematically illustrates a camera module according to a secondembodiment of the present invention; and

FIG. 4 schematically illustrates a camera module according to a thirdembodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 schematically illustrates a spatial information capturing devicefor evaluating a target object according to an embodiment of the presentinvention.

The spatial information capturing device 1 is capable of capturing aspatial information of a target object. In this context, the spatialinformation contains the height and depth relative to the surface of thetarget object, the distance between the target object and the spatialinformation capturing device and any other appropriate spatialinformation. The spatial information is helpful to create thethree-dimensional image. The method of calculating the three-dimensionalimage in the back-end side is well known to those skilled in the art,and is not redundantly described herein.

As shown in FIG. 1, the spatial information capturing device 1 comprisesa structured light generation module 11, a camera module 12 and aprocess controller 13. For capturing the spatial information of a targetobject 9, the structured light generation module 11 of the spatialinformation capturing device 1 provides a structured light L to thetarget object 9. Consequently, an evaluation pattern 113 b is formed onthe target object 9. The spatial information of the target object 9 canbe acquired according to the evaluation pattern 113 b. The method ofacquiring the spatial information of the target object 9 will bedescribed later.

First of all, the operations of the structured light generation module11 will be illustrated as follows. The structured light generationmodule 11 comprises a light source 111, a collimating lens 112 and adiffractive optical element 113. The light source 111 emits plural lightbeams. The collimating lens 112 is arranged between the light source 111and the diffractive optical element 113. The collimating lens 112 isused for collimating the plural light beams. Consequently, the pluralcollimated light beams are directed to the diffractive optical element113. The diffractive optical element 113 has a diffractive pattern.After the plural light beams pass through the collimating lens 112 andthe diffractive optical element 113, the structured light generationmodule 11 outputs a structured light pattern 113 a.

The light source 111 comprises a laser diode (LD), a light emittingdiode (LED), an organic light emitting diode (OLED), and/or alight-emitting unit that emits the light beams with wavelengths in athermal band. The structured light pattern 113 a is a grid pattern, aradial-mesh pattern, a multi-point pattern, a symmetric pattern and/oran asymmetric pattern. It is noted that the example of the structuredlight pattern 113 a is not restricted.

Due to the relative irradiation angle between the structured lightgeneration module 11 and the target object 9 or the lumpy condition ofthe surface of the target object 9, the evaluation pattern 113 b on thetarget object 9 is distorted and slightly different from the originalstructured light pattern 113 a when the structured light L is projectedon the target object 9. However, some relationships between theevaluation pattern 113 b and the structured light pattern 113 a arestilled retained. For example, these relationships include deviationangles or tilt angles, positions of the corresponding points or lines,sizes of the corresponding points, thicknesses of the correspondinglines, directions of the corresponding lines, curvatures of thecorresponding lines, or the like. Please refer to the structured lightpattern 113 a and the evaluation pattern 113 b as shown in FIG. 1. Dueto the irradiation angles, the parallel grid-like lines of thestructured light pattern 113 a are distorted to the nonparallel lines ofthe evaluation pattern 113 b, wherein the left sections of thenonparallel lines are narrower than the right sections of thenonparallel lines. The relationship between the structured light pattern113 a and the evaluation pattern 113 b is presented herein for purposeof illustration and description only.

Hereinafter, the structure of the camera module 12 will be illustratedas follows. In this embodiment, the camera module 12 comprises a lensgroup 121, an optical encoder 122 and a sensing unit 123. In accordancewith a feature of the present invention, the optical encoder 122 has areference pattern 122 a. Preferably, the reference pattern 122 a isspecially designed such that the reference pattern 122 a is identical orsimilar to the structured light pattern 113 a. The optical encoder 122is used for providing the reference pattern 122 a and projecting thereference pattern 122 a onto the sensing unit 123 of the camera module12. Consequently, the reference pattern 122 a is sensed by the sensingunit 123 and used as a comparison basis. That is, the reference pattern122 a is correlated with a first pattern that is projected on thesensing unit 123. Moreover, the evaluation pattern 113 b on the targetobject 9 is also sensed and captured by the sensing unit 123 of thecamera module 12. Consequently, the evaluation pattern 113 b is sensedby the sensing unit 123. That is, the evaluation pattern 113 b iscorrelated with a second pattern that is projected on the sensing unit123. The sensing unit 123 is in communication with the processcontroller 13. Then, the process controller 13 compares the patternfeature difference between the reference pattern 122 a (i.e., the firstpattern) and the evaluation pattern 113 (i.e., the second pattern).According to the comparing result, the process controller 13 cancalculate the spatial information of the target object 9. The operatingprinciples of the present invention have been mentioned as above.

Especially, it is not necessary that the reference pattern 122 a and theevaluation pattern 113 b are completely identical. In an embodiment,only a part of the reference pattern 122 a and a part of the evaluationpattern 113 b are identical. That is, the reference pattern 122 a andthe evaluation pattern 113 b have at least one corresponding patternfeature. The identical part of the reference pattern 122 a and theevaluation pattern 113 b can be used for comparison.

Moreover, the structured light generation module 11 and the processcontroller 13 are dynamically linked with each other. Consequently, thestructured light generation module 11 is actively or passively adjustedby the process controller 13 according to a dynamic change of theevaluation pattern 113 b. For example, when the light source 111 of thestructured light generation module 11 is adjusted by the processcontroller 13, the evaluation pattern 113 b is correspondingly adjusted.Alternatively, when the diffractive optical element 113 of thestructured light generation module 11 is adjusted by the processcontroller 13, the evaluation pattern 113 b is correspondingly adjusted.The image capturing mechanism and the contents of the camera module willbe illustrated in more details as follows.

For well understanding the concepts of the present invention, threeexamples of the camera module will be illustrated as follows. In theseexamples, the reference pattern of the optical encoder and theevaluation pattern on the target object can be effectively captured bythe sensing unit of the camera module. By comparing the differencebetween the reference pattern and the evaluation pattern, the processcontroller can calculate the spatial information of the target object.

FIG. 2 schematically illustrates a camera module according to a firstembodiment of the present invention. In this embodiment, the cameramodule 22 comprises a lens group 221, an optical encoder 222 and asensing unit 223. The lens group 221, the optical encoder 222 and thesensing unit 223 are sequentially arranged along an optical axis X. Thelens group 221 comprises plural lenses 221 a. Moreover, after the lightbeams corresponding to the evaluation pattern 113 b on the target object9 pass through the plural lenses 221 a, the light beams are directedalong the optical axis X and imaged on the sensing unit 223.Consequently, the image of the evaluation pattern 113 b is captured bythe sensing unit 223. On the other hand, after the light beamscorresponding to the reference pattern 222 a on the optical encoder 222pass through a lens 225, the light beams are imaged on the sensing unit223. Consequently, the image of the reference pattern 222 a is capturedby the sensing unit 223. Since the lens group 221, the optical encoder222 and the sensing unit 223 are sequentially arranged along the opticalaxis X, the captured image of the evaluation pattern 113 b and thecaptured image of the reference pattern 222 a are at least partiallyoverlapped with each other. After calculation, the process controller 23acquires the spatial information of the target object 9.

For clearly imaging the reference pattern 222 a on the sensing unit 223,the lens 225 is arranged between the optical encoder 222 and the sensingunit 223. Preferably, the distance between the optical encoder 222 andthe lens 225 is equal to the distance between the lens 225 and thesensing unit 223. In an embodiment, the optical encoder 222 is attachedon the lens group 221. Alternatively, in another embodiment, the opticalencoder 222 and the lens group 221 are separated from each other.

The optical encoder 222 used in the camera module 22 has twoimplementation examples. In a first implementation example, the opticalencoder 222 is a self-illuminating element. For example, the opticalencoder 222 comprises plural liquid crystal structures. These liquidcrystal structures are managed and controlled by a programmable unit(not shown), so that the pattern formed on the optical encoder 222 iscontrollable. For acquiring the spatial information, the programmableunit controls the optical encoder 222. Consequently, the referencepattern 222 a formed on the optical encoder 222 corresponds to thestructured light pattern that is generated by the structured lightgeneration module. Under this circumstance, the reference pattern 222 acorresponds to the evaluation pattern 113 b on the target object 9. In asecond implementation example, the optical encoder 222 is an opticalencoding film. After the ambient light enters the camera module 22 andpasses through the optical encoding film, the reference pattern 222 a onthe optical encoding film can be imaged onto the sensing unit 223.

For enhancing discrimination between the image of the evaluation pattern113 b and the image of the reference pattern 222 a which are captured bythe sensing unit 223, the wavelength of the light beam from the opticalencoder 222 and the wavelength of the structured light L are different.Since the discrimination between these two captured images is enhanced,the computing accuracy is increased.

Moreover, for adjusting the change amount of the captured image on thesensing unit 223 corresponding to the reference pattern 222 a, thecamera module 22 is further equipped with a casing 224 and an adjustingmechanism 226. The adjusting mechanism 226 is partially exposed outsidethe casing 224. In addition, the adjusting mechanism 226 is linked withthe optical encoder 222. When the adjusting mechanism 226 is operated bya user, the optical encoder 222 is moved upwardly, downwardly,leftwards, rightwards, forwardly or backwardly with the motion of theadjusting mechanism 226. Consequently, the relative positions betweenthe optical encoder 222 and the lens group 221 and/or the relativepositions between the optical encoder 222 and the sensing unit 223 areadjustable.

FIG. 3 schematically illustrates a camera module according to a secondembodiment of the present invention. The components of the camera moduleof the second embodiment are similar to those of the first embodiment.In this embodiment, the camera module 32 comprises a lens group 321, anoptical encoder 322 and a sensing unit 323. In comparison with the firstembodiment, the relative positions between the optical encoder 322 andthe lens group 321 of the camera module of this embodiment aredistinguished. The lens group 321 comprises plural lenses 321 a. Afterthe light beams corresponding to the evaluation pattern 113 b on thetarget object 9 are transmitted through the plural lenses 321 a along afirst optical axis X1, the light beams are imaged on a first sensingposition P1 of the sensing unit 323. Consequently, the image of theevaluation pattern 113 b is captured by the sensing unit 323. On theother hand, after the light beams corresponding to the reference pattern322 a on the optical encoder 322 are transmitted through a lens 325along a second optical axis X2, the light beams are imaged on a secondsensing position P2 of the sensing unit 323. Consequently, the image ofthe reference pattern 322 a is captured by the sensing unit 323.

In this embodiment, the first optical axis X1 and the second opticalaxis X2 are in parallel with each other, or the first optical axis X1and the second optical axis X2 are nearly in parallel with each other.Consequently, the first sensing position P1 and the second sensingposition P2 are different. Since the lens group 321 and the opticalencoder 322 are arranged side by side, the imaging path of the lightbeams from the evaluation pattern 113 b on the target object 9 to thesensing unit 323 is not obstructed by the optical encoder 322. Moreover,the process controller 33 can acquire the spatial information of thetarget object 9 according to the overlap region between the capturedimage of the evaluation pattern 113 b and the captured image of thereference pattern 322 a, or the process controller 33 can acquire thespatial information of the target object 9 by directly calculating thepattern feature difference between the captured image of the evaluationpattern 113 b and the captured image of the reference pattern 322 a.

For clearly imaging the reference pattern 322 a on the sensing unit 323,the lens 325 is arranged between the optical encoder 322 and the sensingunit 323. Preferably, the distance between the optical encoder 322 andthe lens 325 is equal to the distance between the lens 325 and thesensing unit 323. Moreover, for adjusting the change amount of thecaptured image on the sensing unit 323 corresponding to the referencepattern 322 a, the camera module 32 is further equipped with anadjusting mechanism 326. The adjusting mechanism 326 is used foradjusting the relative positions between the optical encoder 322 and thesensing unit 323.

FIG. 4 schematically illustrates a camera module according to a thirdembodiment of the present invention. The components of the camera moduleof the third embodiment are similar to those of the first embodiment. Inthis embodiment, the camera module 42 comprises a lens group 421, anoptical encoder 422 and a sensing unit 423. In comparison with the abovetwo embodiments, the relative positions between the optical encoder 422and the lens group 421 of the camera module of this embodiment aredistinguished, and the camera module 42 of this embodiment furthercomprises a beam splitter 421 b. The lens group 421 comprises plurallenses 421 a and the beam splitter 421 b. The beam splitter 421 b allowsthe light beams to be selectively propagated along a first optical axisX1′ or a second optical axis X2′. After the light beams corresponding tothe evaluation pattern 113 b on the target object 9 are transmittedthrough the plural lenses 421 a and the beam splitter 421 b along thefirst optical axis X1′, the light beams are imaged on the sensing unit423 along the first optical axis X1′. On the other hand, after the lightbeams corresponding to the reference pattern 422 a on the opticalencoder 422 are transmitted through a lens 425 along a second opticalaxis X2′ and reflected by the beam splitter 421 b, the light beams areimaged on the sensing unit 423 along the first optical axis X1′.

In this embodiment, the first optical axis X1′ and the second opticalaxis X2′ are perpendicular to each other, or the first optical axis X1′and the second optical axis X2′ are nearly perpendicular to each other.Since the optical encoder 422 is not arranged along the first opticalaxis X1′, the imaging path of the light beams from the evaluationpattern 113 b on the target object 9 to the sensing unit 423 is notobstructed by the optical encoder 422. According to the relativepositions between the beam splitter 421 b, the lens group 421 and theoptical encoder 422, the captured image of the evaluation pattern 113 band the captured image of the reference pattern 422 a are at leastpartially overlapped with each other. After calculation, the processcontroller 43 acquires the spatial information of the target object 9.

Moreover, for adjusting the change amount of the captured image on thesensing unit 423 corresponding to the reference pattern 422 a, thecamera module 42 is further equipped with an adjusting mechanism 426.The adjusting mechanism 426 is used for adjusting the relative positionsbetween the optical encoder 422 and the beam splitter 421 b.

From the above descriptions, the spatial information capturing device ofthe present invention is equipped with the optical encoder. Thereference pattern on the optical encoder and the evaluation pattern onthe target object are simultaneously projected onto the sensing unit.Accordingly, the process controller can calculate the spatial distanceinformation of the target object. Since it is not necessary topreviously store the contents of the reference pattern into the processcontroller, the additional installing time and the additional labor costare saved. Moreover, since the computation of the process controller issimplified, the computing and comparing speed will be increased.

While the invention has been described in terms of what is presentlyconsidered to be the most practical and preferred embodiments, it is tobe understood that the invention needs not be limited to the disclosedembodiments. On the contrary, it is intended to cover variousmodifications and similar arrangements included within the spirit andscope of the appended claims which are to be accorded with the broadestinterpretation so as to encompass all such modifications and similarstructures.

What is claimed is:
 1. A spatial information capturing device,comprising: a structured light generation module providing a structuredlight pattern to a target object, so that an evaluation pattern isformed on the target object; a camera module comprising a lens group, anoptical encoder and a sensing unit, wherein the optical encoder has areference pattern, and the reference pattern and the evaluation patternhave at least one corresponding pattern feature, wherein both of thereference pattern and the evaluation pattern are projected on thesensing unit; and a process controller in communication with the sensingunit, wherein the process controller compares a pattern featuredifference between the reference pattern and the evaluation pattern, andrealizes a spatial distance information of the target object accordingto a result of comparing the pattern feature difference.
 2. The spatialinformation capturing device according to claim 1, wherein the lensgroup comprises plural lenses, and the optical encoder and the plurallenses are sequentially arranged along an optical axis of the lensgroup, wherein the evaluation pattern is transmitted through the plurallenses and projected onto the sensing unit along the optical axis, andthe reference pattern is projected onto the sensing unit along theoptical axis, wherein the optical encoder is attached on the lens group,or the optical encoder is separated from the lens group.
 3. The spatialinformation capturing device according to claim 1, wherein the lensgroup comprises plural lenses, the evaluation pattern is transmittedthrough the plural lenses and projected onto a first sensing position ofthe sensing unit, and the reference pattern is projected onto a secondsensing position of the sensing unit, wherein the first sensing positionand the second sensing position are different, wherein the opticalencoder is attached on the lens group, or the optical encoder isseparated from the lens group.
 4. The spatial information capturingdevice according to claim 1, wherein the lens group comprises a beamsplitter and plural lenses, and the beam splitter splits allows lightbeams to be selectively propagated along a first optical axis or asecond optical axis, wherein the evaluation pattern is transmittedthrough the plural lenses and the beam splitter along the first opticalaxis and projected onto the sensing unit along the first optical axis,and the reference pattern is directed to the beam splitter along thesecond optical axis and reflected to the sensing unit along the firstoptical axis, wherein the optical encoder is attached on the lens group,or the optical encoder is separated from the lens group.
 5. The spatialinformation capturing device according to claim 1, wherein the opticalencoder is a self-illuminating element, or the optical encoder is anoptical encoding film.
 6. The spatial information capturing deviceaccording to claim 1, wherein the optical encoder comprises pluralliquid crystal structures, wherein the plural liquid crystal structuresare managed by a programmable unit, so that the reference pattern iscontrollable.
 7. The spatial information capturing device according toclaim 1, wherein a wavelength of a light beam from the optical encoderis different from a wavelength of a structured light from the structuredlight generation module.
 8. The spatial information capturing deviceaccording to claim 1, wherein the camera module further comprises acasing and an adjusting mechanism, and the adjusting mechanism ispartially exposed outside the casing, wherein the adjusting mechanism islinked with the optical encoder, and the optical encoder is driven bythe adjusting mechanism, so that relative positions between the opticalencoder and the lens group and/or relative positions between the opticalencoder and the sensing unit are adjustable by a user.
 9. The spatialinformation capturing device according to claim 1, wherein thestructured light generation module comprises a light source, acollimating lens and a diffractive optical element, wherein thestructured light pattern from the structured light generation modulecorresponds to the evaluation pattern on the target object, wherein thelight source comprises a laser diode, a light emitting diode, an organiclight emitting diode and/or a light-emitting unit that emits light beamswith wavelengths in a thermal band.
 10. The spatial informationcapturing device according to claim 9, wherein the structured lightpattern is a grid pattern, a radial-mesh pattern, a multi-point pattern,a symmetric pattern and/or an asymmetric pattern.
 11. The spatialinformation capturing device according to claim 1, wherein thestructured light generation module and the process controller aredynamically linked with each other, wherein the structured lightgeneration module is adjusted by the process controller according to adynamic change of the evaluation pattern.
 12. The spatial informationcapturing device according to claim 11, wherein when a light source ofthe structured light generation module is adjusted by the processcontroller, the evaluation pattern is correspondingly changed.
 13. Thespatial information capturing device according to claim 11, wherein whena diffractive optical element of the structured light generation moduleis adjusted by the process controller, the evaluation pattern iscorrespondingly adjusted.